The option to do this appears greyed out for me, can any of you help with this or any suggestions
Which option is greyed out, are you a full permission administrator your Exchange on-premises? I sounds like the lack of permissions.
Could you provide a screenshot about it? It helps us to understand your problem clearly and provide suggestion to you.
- Where is this distribution group AD account hosted?
- Are you the member of this group?
- What is the error message when you try to modify this group?
If this group is sync from Exchange on-premises, you need to manage it from Exchange on-premises.
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